Prozesu Katalitikoak eta Hondakinen Balioztatzea

Ikerketa Taldea

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Abstract: A multilayer perceptron with back-propagation learning algorithm is developed to predict the minimum spouting velocity (ums) in draft tube conical spouted beds. Six dimensionless variables involving ten essential geometric and operating parameters of the beds were taken as model inputs. To compare the model results with both experimental data and those predicted by the limited...

The electrocatalytic reduction of CO2 has been investigated using four Cu-based metal–organic porous materials supported on gas diffusion electrodes: metal–organic frameworks (MOFs) and metal–organic aerogels (MOAs). The electrodes show relatively high surface areas, accessibilities, and exposure of the Cu catalytic centers as well as favorable electrocatalytic CO2 reduction performance, that...

Abstract: Particle entrainment is a serious problem in spouted bed contactors when operation is carried out using beds made up of ultrafine particles, irregular ones and fine and coarse particle mixtures. Accordingly, the conventional conical spouted bed has been modified by inserting a fountain confiner in the contactor, and a study has been carried out on the efficiency of the...

Abstract: Orange juice is consumed worldwide, with Brazil and the United States being the largest producers. The waste pulp corresponds to approximately 50% of the weight of the fruit. As a result, large amounts of solid wastes are generated by the citrus industry, making its disposal potentially hazardous to the environment. This work aimed at the modeling of orange waste drying in a...

Abstract: In this study, we examine the electrochemical-driven reduction of CO2 to methanol at Cu2O/ZnO gas diffusion electrodes in soluble pyridine-based electrolytes at different concentrations. The process is evaluated first by cyclic voltammetric analyses and then, for the continuous reduction of CO2 in a filter-press electrochemical cell. The results showed that the use of pyridine-based...

Abstract: The deactivation during the cracking of glycerol into valued chemicals and fuels has been studied under realistic FCC conditions using HZSM-5 or HY zeolite based catalysts. These catalysts suffer a severe catalyst deactivation by coke, which has been characterized quantitatively and qualitatively by TG-TPO, MS/FTIR-TPO, FTIR, 1H and 13C NMR spectroscopies. The first part of...

Abstract: Carbon-based adsorbents were prepared through the physical activation of sewage sludge with CO2. The effect of the acid treatment was investigated, either before or after the physical activation. The post-washing increases the porosity due to the removal of the inorganic fraction and the improvement in the accessibility of the carbon fraction. The post-washing is essential for...

Abstract: Steam pyrolysis (500 °C) of high density polyethylene (HDPE) in a conical spouted bed reactor followed by a steam reforming (700 °C) in a fixed bed reactor (Ni commercial catalyst) has been carried out for obtaining a syngas stream rich in H2. The product yields obtained in the pyrolysis of HDPE using steam are very similar to the previous ones with N2 as fluidizing agent. A...

Abstract: The continuous fast pyrolysis (500 °C) of pine wood sawdust has been studied in a conical spouted bed reactor (CSBR) followed by in-line steam reforming of the pyrolysis vapours in a fluidised bed reactor on a Ni commercial catalyst. An analysis has been carried out on the effect reforming temperature in the 550–700 °C range, space time from 2.5 to 30 gcat min gvolatiles−1 and...

Abstract: A continuous process has been developed consisting in the flash pyrolysis (500 °C) of high density polyethylene (HDPE) in a conical spouted bed reactor (CSBR) followed by steam reforming in a fluidized bed reactor (Ni commercial catalyst). The effect reforming temperature in the 600–700 °C range, space time from 2.1 to 20.8 gcat min gHDPE−1 and steam/plastic ratio between 3 and...